Fix background color for incognito tabs when material design is enabled

chrome/android/java/src/org/chromium/chrome/browser/ntp/IncognitoNewTabPageView.java

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser.ntp;
 
 import android.content.Context;
 import android.graphics.Canvas;
 import android.util.AttributeSet;
 import android.view.View;
@@ skipping 32 matching lines @@
     /** Default constructor needed to inflate via XML. */
     public IncognitoNewTabPageView(Context context, AttributeSet attrs) {
         super(context, attrs);
     }
 
     @Override
     protected void onFinishInflate() {
         super.onFinishInflate();
 
         mScrollView = (NewTabPageScrollView) findViewById(R.id.ntp_scrollview);
+        mScrollView.setBackgroundColor(
+                NtpColorUtils.getBackgroundColorResource(getResources(), true));
 
         // FOCUS_BEFORE_DESCENDANTS is needed to support keyboard shortcuts. Otherwise, pressing
         // any shortcut causes the UrlBar to be focused. See ViewRootImpl.leaveTouchMode().
         mScrollView.setDescendantFocusability(FOCUS_BEFORE_DESCENDANTS);
 
         View learnMore = findViewById(R.id.learn_more);
         learnMore.setOnClickListener(new OnClickListener() {
             @Override
             public void onClick(View v) {
                 mManager.loadIncognitoLearnMore();
@@ skipping 35 matching lines @@
     @Override
     public void onAttachedToWindow() {
         super.onAttachedToWindow();
         assert mManager != null;
         if (mFirstShow) {
             mManager.onLoadingComplete();
             mFirstShow = false;
         }
     }
 }